{"product_id":"osg-1700508-spiral-point-tap-1-4-28-unf-3-flute-plug","title":"Osg 1700508 Spiral Point Tap 1\/4-28 Unf 3 Flute Plug","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe OSG 1700508 is a spiral point tap designed for threading 1\/4-28 UNF internal threads in demanding materials. Built from powdered metal and finished with a TiCN coating, this tap delivers extended tool life in applications where standard high-speed steel falls short. The plug chamfer style makes it a general-purpose choice for through-hole threading operations. With a 3-flute spiral point geometry, it pushes chips ahead of the cut rather than packing them into the flute, reducing the risk of tap breakage and improving thread finish. Suitable for use by machinists, tool-and-die makers, and maintenance professionals working in production or repair environments.\u003c\/p\u003e\n\u003cp\u003eThis tap is rated for use in hardened steel, stainless steel, high-nickel alloy, titanium, alloy steel, and die steel  -  material types common in aerospace, defense, industrial manufacturing, and precision machining. The right-hand thread direction and H6 thread limit classification indicate a slightly oversize cutting tolerance, which compensates for springback when tapping tougher alloys. The TiCN coating reduces friction and heat buildup at the cutting edge, extending tap life compared to uncoated alternatives. It is well-suited for job shops and maintenance operations that regularly encounter difficult-to-machine materials.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e1\/4-28 UNF thread form, right-hand direction\u003c\/li\u003e\n  \u003cli\u003e3-flute spiral point geometry pushes chips forward for cleaner through-hole tapping\u003c\/li\u003e\n  \u003cli\u003ePowdered metal construction provides higher wear resistance than standard HSS\u003c\/li\u003e\n  \u003cli\u003eTiCN coating reduces friction and extends tool life in hard and abrasive materials\u003c\/li\u003e\n  \u003cli\u003eH6 thread limit with oversize designation for use in springback-prone alloys\u003c\/li\u003e\n  \u003cli\u003ePlug chamfer style for standard through-hole threading applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eRated for hardened steel, stainless steel, high-nickel alloy, titanium, alloy steel, and die steel. OSG Series 312 designation. Designed as a replacement-style tap for 1\/4-28 UNF through-hole applications in production and maintenance machining.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a qualified machinist using a calibrated tapping head, CNC machine, or drill press with proper alignment. Always apply cutting fluid appropriate for the workpiece material, particularly when tapping stainless steel or high-nickel alloys. Ensure the tap is fully supported and running true before engaging the workpiece to avoid deflection or breakage. Follow shop safety protocols and applicable machine operation standards when changing or running cutting tools.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 1\/4-28 UNF\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNF\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 3\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChamfer Style\u003c\/strong\u003e: Plug\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Limit\u003c\/strong\u003e: H6\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOversize\u003c\/strong\u003e: Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Powdered Metal\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: TiCN\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2.5 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 0.62 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.255 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInterrupted Thread\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 312\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.032 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: OSG\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 1700508\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51742879088946,"sku":"1700508","price":63.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/f037cfbe3d1872fe259a871295acd92f_0037a351-695a-44ce-ab0c-58e5a6beed6f.jpg?v=1788840151","url":"https:\/\/voomisupply.com\/products\/osg-1700508-spiral-point-tap-1-4-28-unf-3-flute-plug","provider":"Voomi Supply","version":"1.0","type":"link"}